===== digital_output group =====

This group contains all digital output signals.

Each signal is a sub group with the signal name as the group name.

<code>
    "digital_output": {
        "green_led": {
            "type": "push pull",
            "pad": "PA3",
            "on_boot": "enabled"
        }
    }
</code>

==== type ====

defines what type of output mode should be used. Type can be:
  * push pull
  * open drain

**type**: enum

**default**: push pull

==== pad ====

defines the chip pad that the signal should be output on.

**type**: string

**default**: no default possible

==== invert ====

If this setting is set to "enabled" then turning this output "on" will generate a Low (Gnd) signal. Turning it "off" will generate a High (Vcc) level.

If this setting is set to "disabed" (=default) then turning this output "on" will generate a High (Vcc) signal. Turning it "off" will generate a Low (Gnd) level.

**type**: bool

**default**: "disabled"

==== pull_up ====

enables the pull up resistor.

**type**: bool

**default**: disabled

==== pull_down ====

enables the pull down resistor.

**type**: bool

**default**: disabled


==== on_boot ====

defines the logic level to be set on initialization. Setting this to "enabled" will set the pin High (Vcc) if inverted is disabled.

**type**: bool

**default**: disabled

==== drive_strength ====

defines the amount of current that can be driven from the pin. Possible values are:
  * 2mA
  * 4mA
  * 8mA
  * 12mA

**type**: enum

**default**: 2mA

==== slew_rate ====

defines the rise and fall times. Possible values are:
  * slow
  * fast

**type**: enum

**default**: "slow"


===== API =====
The part "signal_name" in the described functions will be replaced by the name of the signal. E.g. if your signal is called "debug_led" then the API function "signal_name_on" will become "debug_led_on".

<code>void signal_name_on(void)</code>
Will set the output pin to output a high Signal. The pin will be at Vcc.
If the signal has the "invert" property "on" then the Output will be Low (Gnd).


<code>void signal_name_off(void)</code>
Will set the output pin to output a low Signal. The pin will be at Gnd.
If the signal has the "invert" property "on" then the Output will be High (Vcc).